Catalytic properties of ferrites in oxidation reactions

“…Yu Yao also reported a significant poisoning effect of SO 2 , as observed for many single oxides and perovksite presented in this work. Pirogova et al 379. reported the activity in CO oxidation (5–6 % CO in air, GHSV=600 h −1 ) of more than ten different spinel‐type mixed oxides (AB 2 O 4 ; A=Cu, Ni, Mn, Zn, Mg, Co; B=Co, Cr, Al).…”

Section: Co Oxidation Over Mixed Oxide Catalystsmentioning

confidence: 99%

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

2010

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International audienceOxidation into CO2 is a major solution to CO abatement in air depollution treatments. The development of catalytic converters led to an extraordinary high number of publications on metal catalysts during the last fifty years. Due to the increasing price of noble metals and to remarkable progresses in oxide syntheses, catalytic oxidation of carbon monoxide over oxide catalysts has recently gained in interest, even if some oxides are known to present remarkable activity since the beginning of the 20th century. In this Review, the kinetics and mechanism of CO oxidation on single and mixed oxides are examined, alongside the catalyst structure

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“…The conditions of analysi~ have previously been described. 6 The interaction of gases with the catalyst surface was studied by the pulse method on a KL-I installation using 1.5 g of the catalyst. The starting gas mixture contained 14--18 tool.% CO; the rest was air or N 2.…”

Section: Experimental "mentioning

confidence: 99%

“…The gas mixture was passed through the catalyst bed in a He flow at temperatures from -20 *C to 300--400 ~ The composition of gases was examined by GC. 6 The activities of the catalysts were compared by the temperature corresponding to a 5096 or 100% conversion of the starting reagents (a).…”

Section: Experimental "mentioning

confidence: 99%

Oxidation of CO and hydrocarbons over perovskite-type complex oxides

et al. 1999

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The catalytic activity of perovskites MIMIIO3 (M I = La; M l! = Co, Mn, Cr, A1, Ni, and V) and MICoO 3 (M = Y, Nd, Sm, and Er) in the oxidation of CO, propylene, and ethylben~ene was investigated. The highest activity was observed for the MICoO:3 catalysts with perfect perovskite structure. The nature of the rare-ear;tin element has no influence on the catalytic activity. Deformation of the octahedral coordination of the metal was found for the less active catalysts. The interaction of gases (CO, CO+air) with the catalyst surface was investigated. The more active catalysts adso~ a greater amount of O2, and the adsorpfior~ occurs in the temperature region of the oxidation reaction. The activities of the perovskiteand spinel-type catalysts were compared under similar conditions.

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Catalytic properties of ferrites in oxidation reactions

Cited by 9 publications

References 1 publication

Some nanograined ferrites and perovskites for catalytic combustion of acetone at low temperature

Some nanograined ferrites and perovskites for catalytic combustion of acetone at low temperature

Catalytic Oxidation of Carbon Monoxide over Transition Metal Oxides

Oxidation of CO and hydrocarbons over perovskite-type complex oxides

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